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Study on acute exposure of polyethylene terephthalate microplastics on the performance of anammox granular sludge.

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Τίτλος: Study on acute exposure of polyethylene terephthalate microplastics on the performance of anammox granular sludge.
Συγγραφείς: Zhao Y; School of Transportation Engineering, Dalian Jiaotong University, Dalian, 116028, China., Qin H; School of Transportation Engineering, Dalian Jiaotong University, Dalian, 116028, China., Lyu Y; School of Transportation Engineering, Dalian Jiaotong University, Dalian, 116028, China., Yan S; School of Transportation Engineering, Dalian Jiaotong University, Dalian, 116028, China. Electronic address: jdyansong@djtu.edu.cn., Yu H; School of Transportation Engineering, Dalian Jiaotong University, Dalian, 116028, China.
Πηγή: Anaerobe [Anaerobe] 2025 Aug; Vol. 94, pp. 102984. Date of Electronic Publication: 2025 Jul 08.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Academic Press Country of Publication: England NLM ID: 9505216 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-8274 (Electronic) Linking ISSN: 10759964 NLM ISO Abbreviation: Anaerobe Subsets: MEDLINE
Imprint Name(s): Publication: London : Academic Press
Original Publication: London ; San Diego : Academic Press, c1995-
Ιατρικοί όροι (MeSH): Sewage*/microbiology , Microplastics*/metabolism , Ammonia*/metabolism , Anaerobic Ammonia Oxidation*/drug effects , Polyethylene Terephthalates*, Bioreactors/microbiology ; Anaerobiosis ; Particle Size ; Denitrification ; Oxidation-Reduction
Περίληψη: Background: Anaerobic ammonia oxidation is a new and efficient biological denitrification process, which has been used in practice. Research on the effect of microplastics (MPs) on anaerobic ammonia oxidation (anammox) process is limited.
Topic: In this study, the effects of short-term exposure of polyethylene terephthalate (PET) with different particle sizes for 12 h on anammox granular sludge (AnGS) and the metabolic mechanism of anaerobic ammonia oxidizing bacteria (AnAOB) were studied.
Results: The results showed that the acute exposure of anammox reactor to PET-MPs could promote the denitrification rate of the reactor. The enzyme activity of hydrazine dehydrogenase (HDH), the key enzyme of anammox reaction, was increased under acute exposure of different particle sizes of PET-MPs. PET-MPs with larger particle size had a stronger promoting effect on the treatment efficiency and HDH activity of the reactor. PET-MPs could stimulate AnAOB to secrete a large amount of extracellular polymeric substances (EPS). Metabonomic analysis showed that after the addition of PET-MPs, the abundance of 3-methoxytyramine was down-regulated, and the abundance of L-serine decreased. In the 13 μm PET-MPs group, the abundance of L-asparagine was up-regulated, changes in these metabolites affected various amino acid metabolism, proteolytic enzymes, and AnAOB biosynthesis.
Implication: This study provides valuable insights into the response characteristics and mechanism of the anammox process exposed to MPs, which may be helpful for the application of MPs in wastewater treatment.
(Copyright © 2025 Elsevier Ltd. All rights reserved.)
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Contributed Indexing: Keywords: Anammox; Metabolomics; Microplastics; Polyethylene terephthalate
Substance Nomenclature: 0 (Sewage)
0 (Polyethylene Terephthalates)
0 (Microplastics)
7664-41-7 (Ammonia)
Entry Date(s): Date Created: 20250709 Date Completed: 20250826 Latest Revision: 20250826
Update Code: 20260130
DOI: 10.1016/j.anaerobe.2025.102984
PMID: 40633716
Βάση Δεδομένων: MEDLINE
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  – Url: https://www.doi.org/10.1016/j.anaerobe.2025.102984?
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  Data: Study on acute exposure of polyethylene terephthalate microplastics on the performance of anammox granular sludge.
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  Data: <searchLink fieldCode="AU" term="%22Zhao+Y%22">Zhao Y</searchLink>; School of Transportation Engineering, Dalian Jiaotong University, Dalian, 116028, China.<br /><searchLink fieldCode="AU" term="%22Qin+H%22">Qin H</searchLink>; School of Transportation Engineering, Dalian Jiaotong University, Dalian, 116028, China.<br /><searchLink fieldCode="AU" term="%22Lyu+Y%22">Lyu Y</searchLink>; School of Transportation Engineering, Dalian Jiaotong University, Dalian, 116028, China.<br /><searchLink fieldCode="AU" term="%22Yan+S%22">Yan S</searchLink>; School of Transportation Engineering, Dalian Jiaotong University, Dalian, 116028, China. Electronic address: jdyansong@djtu.edu.cn.<br /><searchLink fieldCode="AU" term="%22Yu+H%22">Yu H</searchLink>; School of Transportation Engineering, Dalian Jiaotong University, Dalian, 116028, China.
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  Data: <i>Publisher: </i><searchLink fieldCode="PB" term="%22Academic+Press%22">Academic Press </searchLink><i>Country of Publication: </i>England <i>NLM ID: </i>9505216 <i>Publication Model: </i>Print-Electronic <i>Cited Medium: </i>Internet <i>ISSN: </i>1095-8274 (Electronic) <i>Linking ISSN: </i><searchLink fieldCode="IS" term="%2210759964%22">10759964 </searchLink><i>NLM ISO Abbreviation: </i>Anaerobe <i>Subsets: </i>MEDLINE
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  Data: <i>Publication</i>: London : Academic Press<br /><i>Original Publication</i>: London ; San Diego : Academic Press, c1995-
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  Data: <searchLink fieldCode="MM" term="%22Sewage%22">Sewage*</searchLink>/<searchLink fieldCode="MM" term="%22Sewage+microbiology%22">microbiology</searchLink> <br /><searchLink fieldCode="MM" term="%22Microplastics%22">Microplastics*</searchLink>/<searchLink fieldCode="MM" term="%22Microplastics+metabolism%22">metabolism</searchLink> <br /><searchLink fieldCode="MM" term="%22Ammonia%22">Ammonia*</searchLink>/<searchLink fieldCode="MM" term="%22Ammonia+metabolism%22">metabolism</searchLink> <br /><searchLink fieldCode="MM" term="%22Anaerobic+Ammonia+Oxidation%22">Anaerobic Ammonia Oxidation*</searchLink>/<searchLink fieldCode="MM" term="%22Anaerobic+Ammonia+Oxidation+drug+effects%22">drug effects</searchLink> <br /><searchLink fieldCode="MM" term="%22Polyethylene+Terephthalates%22">Polyethylene Terephthalates*</searchLink><br /><searchLink fieldCode="MH" term="%22Bioreactors%22">Bioreactors</searchLink>/<searchLink fieldCode="MH" term="%22Bioreactors+microbiology%22">microbiology</searchLink> ; <searchLink fieldCode="MH" term="%22Anaerobiosis%22">Anaerobiosis</searchLink> ; <searchLink fieldCode="MH" term="%22Particle+Size%22">Particle Size</searchLink> ; <searchLink fieldCode="MH" term="%22Denitrification%22">Denitrification</searchLink> ; <searchLink fieldCode="MH" term="%22Oxidation-Reduction%22">Oxidation-Reduction</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Background: Anaerobic ammonia oxidation is a new and efficient biological denitrification process, which has been used in practice. Research on the effect of microplastics (MPs) on anaerobic ammonia oxidation (anammox) process is limited.<br />Topic: In this study, the effects of short-term exposure of polyethylene terephthalate (PET) with different particle sizes for 12 h on anammox granular sludge (AnGS) and the metabolic mechanism of anaerobic ammonia oxidizing bacteria (AnAOB) were studied.<br />Results: The results showed that the acute exposure of anammox reactor to PET-MPs could promote the denitrification rate of the reactor. The enzyme activity of hydrazine dehydrogenase (HDH), the key enzyme of anammox reaction, was increased under acute exposure of different particle sizes of PET-MPs. PET-MPs with larger particle size had a stronger promoting effect on the treatment efficiency and HDH activity of the reactor. PET-MPs could stimulate AnAOB to secrete a large amount of extracellular polymeric substances (EPS). Metabonomic analysis showed that after the addition of PET-MPs, the abundance of 3-methoxytyramine was down-regulated, and the abundance of L-serine decreased. In the 13 μm PET-MPs group, the abundance of L-asparagine was up-regulated, changes in these metabolites affected various amino acid metabolism, proteolytic enzymes, and AnAOB biosynthesis.<br />Implication: This study provides valuable insights into the response characteristics and mechanism of the anammox process exposed to MPs, which may be helpful for the application of MPs in wastewater treatment.<br /> (Copyright © 2025 Elsevier Ltd. All rights reserved.)
– Name: Abstract
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  Data: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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  Data: <i>Keywords: </i>Anammox; Metabolomics; Microplastics; Polyethylene terephthalate
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  Data: 0 (Sewage)<br />0 (Polyethylene Terephthalates)<br />0 (Microplastics)<br />7664-41-7 (Ammonia)
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        Type: general
      – SubjectFull: Anaerobiosis
        Type: general
      – SubjectFull: Particle Size
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